有一个有效的信用卡。
Please enter a valid credit card number.
请输入正确的信用卡号码。
Don't expect to be able to advance to the next page unless you disable validation or enter a valid credit card number.
除非您禁用验证或输入有效的信用卡卡号，否则不要期望能够进入下一个页面。
Credit card information was to be passed to an external system, so we had to ensure we at least had a valid number.
信用卡信息要传递到外部系统，所以我们必须确保至少有一个有效号码。
Process a payment transaction if the credit card is valid.
如果信用卡有效，处理付款事务。
A credit card is not a valid proof of identity.
卡不是有效的身份证明文件。
It does not verify any other information on a credit card, including whether the card's date is valid.
它不验证其他信用卡信息，包括卡的日期是否有效。
The LUHN formula can be used by a business to make sure a credit card is valid before sending the number for debit authorization.
LUHN公式可以由业务使用，以确保信用卡发送借记卡的号码授权之前是有效的。
The LUHN formula can be used by a business to make sure a credit card is valid before sending the number for debit authorization.
LUHN公式可以由业务使用，以确保信用卡发送借记卡的号码授权之前是有效的。
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